It is done in sheer kindness and affection.

They intend to offer something which shall soften and not aggravate the sorrow that they have caused.

"You can't marry me yourself," the lady seems to say.

"But the next greatest blessing which I can offer you shall be yours;--you shall see me married to somebody else." I fully appreciate the intention, but in honest truth, I doubt the eligibility of the proffered entertainment.
On the present occasion John Eames seemed to be of this opinion, for he did not at once accept the invitation.
"Will you not oblige me so far as that ?" she said softly.
"I would do anything to oblige you," said he gruffly; "almost anything." "But not that ?" "No; not that.

I could not do that." Then he went off upon his figure, and when they were next both standing together, they remained silent till their turn for dancing had again come.